Piece base PCB - SMD version

[Tony]

For the pre-assembled piece boards, cut 64 short pieces of thin 'hookup wire', about 2.5-3cm long. Strip and tin each end then solder one of the above trimmed socket pins onto one end of each of the 64 wires.
Place the piece PCB with the 2 large solder pads at about 10 and 2 o'clock then solder one wire to each of the 2 pads. Repeat for all 32 PCBs, using your 64 wires.



Connect the wire from the left pad to the tube anode (IN-7 pin2, IN15 pin1) and the wire from the right pad to the required tube cathode, as in the instructions below.
This method makes it much easier to assemble rather than having to try and hold the pins onto the PCB in the correct position and vertacal whilst soldering them.

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Original instructions:

For this you will need the entire contents of BAG 3 (SMD components and BAG 4 (Piece PCBs) plus solder from BAG 5.

99x Diode packs - Three legged black rectangles with text etched on the top surface. These are polarised and must face the same way as in the photographs with the text facing up.

33x Glass Diodes - Copper-orange glass cylinders with a black band marking one end. These are polarised and must face the same way as in the photographs.

230x 0.1uF Capacitors - Beige rectangles with solder on either end, not polarised. Seven of these are used on each board.

33x 1nF Capacitors - Grey rectangles with solder on either end, not polarised. One of these is used on each board.

[Tony]

First fit the 7x 0.1u ceramic capacitors:

Note that you may find it easier to fit the diode packs first, it's up to you.

[Tony]

Next the 3 diode packs, they can only fit one way round if you make sure the text is facing up:

[Tony]

Next the glass diode, the band FACES C2:

[Tony]

Next the 1n tuning capacitor, this is grey compared to the beige 0.1u multiplier caps:

[Tony]

Finally using fine wire or solder, bridge these three pads:

[Tony]

Dismantle the three 25 way 'D' sockets, the easiest way is to cut through one of the rivets then seperate the two halves of the shell.



Open up the socket housing and remove the pins.



Cut the pin leg, just below the 'bump' under the contacts:

[Tony]

Tin the cut end of 2 pins then put a blob of solder on the pads shown here:



Using tweezers, hold the pin over the solder blob and melt it. Push it into the solder and hold in place until set.

Make two of these for use with 2x IN-15Bs: Queens

[Tony]

Make sixteen of these for use with 16x IN-15Bs: Pawns

[Tony]

Make four of these for use with 4x IN-15As: Rooks